本研究係應用熱脫附技術處理戴奧辛/呋喃污染之土壤，主要探討溫度對脫附效率及熱脫附後土壤中戴奧辛/呋喃濃度之影響。實驗結果顯示，溫度對戴奧辛/呋喃的脫附效率與熱脫附後之土壤的戴奧辛/呋喃濃度有明顯影響。當實驗溫度於750°C與850°C時，總戴奧辛/呋喃之熱脫附效率幾乎都達到99.9%以上，而總戴奧辛/呋喃之熱解效率亦可達到97%以上。此外，經由750°C與850°C熱脫附後之土壤，總戴奧辛/呋喃濃度平均濃度分別為0.892 ng I-TEQ/kg與1.15 ng I-TEQ/kg，皆能符合土壤中戴奧辛/呋喃之濃度管制標準(1000 ng I-TEQ/kg)。

A thermal desorption technoloy was choosen to treat the contaminated soil of polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDD/Fs). The main target of this work was to investigate the effects of heating temperatures on desorption efficiency and the PCDD/F concentrations in the thermal treated soils. Results reveal that the heating temperature is a significant factor that influenced both desorption efficiency and PCDD/F concentrations in the thermal treated soils. When heating temperatures were set at 750°C and 850°C, the desorption efficiency of the total PCDD/Fs in the contaminated soil was more than 99% and the pyrolysis efficiency of total PCDD/Fs was more than 97%. In addition, the total PCDD/Fs I-TEQ concentrations in the two desorbed soils at temperatures of 750°C and 850°C were 0.892 and 1.15 ng I-TEQ/kg, respectively, both were below the soil pollution regulated standard in Taiwan (1000 ng I-TEQ/kg).

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